Hi @yerzinperez 
Welcome to the Postman Community!
Sorry for the hassle, but happy to help!
It might be due to web-socket connection issue.
Are you able to use the web dashboard (go.postman.co) without any issue?
If you are using VPN/Firewall/proxy etc, please whitelist the following domains to allow WebSocket connections for Postman:
*.getpostman.com
*.postman.co
*.pstmn.io
*postman.com
By default webSocket connections use the same ports as HTTP (80) and HTTPS (443).
If the issue persists, please submit a support request from the following link so that we can assist you further!
https://support.postman.com/hc/en-us/requests/new